Improvement in plastic roofings



UNITED STATES PATENT OFFIoE.

ELIAS BURNHAM, OF PETERBOROUGH, CANADA.

IMPROVEMENT IN PLASTIC ROOFINGS.

Specification forming part of Letters Patent No. 151,683, dated June 9,1874; application filed August 15, 1873.

To all whom it may concern:

Be it known that I, ELIAS BURNHAM, of the town of Peterborough, in thecounty of Peterborough, in the Provinceof Ontario and Dominion ofCanada, have invented a certain new and useful roofing-material andmethod of applying the same to roofs, walls, 860., of which thefollowing is a specification:

My invention embraces both the material applied and the method ofapplying it, the said material being formed in the act of placing it onthe surface to be covered, thus making my invention to differ from manyother roofings entirely portable, as also from others applied as amortar or cement, the formation and effect of which it is my purpose toavoid, although such roofings do contain in different combinations, andcombinations which from their nature are essentially different from myinvention, ingredients claimed by me in the specific relation andcombination hereinafter set forth.

The one process of manufacture and application of my roofing-material isas follows: Take the common felt now in use and spread it upon the roof.Upon the felt then put a heavy coat of common pitch. Upon the pitch puta heavy coat of coal-tar in a boiling state, and into the coal-tar whileso heated pour as much clean, coarse, sharp, sifted sand as the coal-tarwill take up. The roofing is then left for a few days, at the end ofwhich time it will be set and perfectly hard. Then lay upon the roof athin layer of loose sand, and it is completed.

Having described my invention I claim- A roofing formed as follows, towit: Sheetfelting covered by a coat of common pitch, said pitchedfelting being afterward covered with a coat of coal-tar in a boilingstate, into the said coal-tar while so heated being poured as muchclean, coarse, sharp, sifted sand as the coal-tar will take up,substantially as herein specified, for the purpose set forth.

In witness whereof I have hereunto subscribed my name in the presence oftwo witnesses.

ELIAS BURNHAM.

Witnesses:

WILLIAM COULTER, J r., WILLIAM BELL.

